JOHANNESBURG, Sept 6 (Reuters) - South African petrochemicals company Sasol's 2019 finical results will be delayed further after additional work was commissioned under a review at its U.S. ethane cracker project, it said on Friiday, sending its share price lower.

Sasol has delayed release of its 2019 financial results to a date some time before the end of next month, spokesman Alex Anderson said.

"The board has resolved to commission additional work under the independent review and to stipulate for in-depth investigation into certain aspects contemplated under the original scope," Sasol said in a statement on Friday.

Shares in Sasol were down 3.6% at 261.60 rand by 0841 GMT.

The project in Louisiana, which will convert natural gas into plastics ingredient ethylene, was initially expected to cost $8.9 billion but that 2014 forecast has since been revised to as much as $12.9 billion.

Sasol said it would make a further announcement on its results as soon as a date has been determined. (Reporting by Tanisha Heiberg Editing by David Goodman)